Mailing List Archive Mailing List Archive
Rod, He was responding to a discussion about using trimix for shallower dives (>100'). Everybody was talking about normoxic mixes but apparently he had never thought about actually adding O2 to his mix along with He. He must be thinking of simple Heliair not a real trimix with the proper pO2. BTW I'll look forward to seeing your computer in January. Does it have the exact same software that you have been using in Marco's unit?? What is the difference between the new and the old system. Jeremy At 12:14 PM 10/17/97 -0400, Roderick Farb wrote: >I am guessing that he is saying that the 9 or 10% O2 you would use as >bottom mix for a four hundred foot dive is hypoxic at 20 feet. I haven't >been following this thread because of its profoundness, but what he said >in this post leads me to believe he has the concept right just the wrong >figures. However, with an electronic rebreather 9% O2 in a rebreather mix >would be perfectly breathable at 20 feet. So in my 21 cu ft. diluent >bottle of 10/70 trimix, I have a gas that I can breathe from the surface >to the bottom and back up again if need be. It doesn't matter to a >rebreather diver what the pO2 in the mix he's breathing as long as it is >brewed to be equal to or less than the unit's pO2 setpoint when diving at >maximum depth. I run at pO2 setpoint of 1.3, so for a 300 foot dive 10% O2 >is fine. And the unit maintains pO2 of 1.3 for the entire dive even at 20 >feet. What I do at twenty feet is turn off all diluent gases, Empty and >fill the bag with pure O2 (95% at best) three times and breathe the O2 >only until clear of the water. THE MAX computer works best in this >situation in the fixed setpoint mode (even if it is connected to your >unit's O2 sensors), it assumes you are breathing 80% O2 when you are >breathing about 95%. Rod Farb > >On Thu, 16 Oct 1997, Jeremy Downs wrote: > >> J- >> Your just kidding right???? Think about what your saying man. >> >> >> At 09:28 AM 10/16/97 -0700, Jason Reese wrote: >> >> >Trimix is generally never used shallower than 100-120 ft. Depending on the >> >mix you could die of asphyxia at shallow depths with trimix due to the >> >reduced oxygen. >> > >> > -- Jason >> >> -- >> Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. >> Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. >> > > > -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
Navigate by Author:
[Previous]
[Next]
[Author Search Index]
Navigate by Subject:
[Previous]
[Next]
[Subject Search Index]
[Send Reply] [Send Message with New Topic]
[Search Selection] [Mailing List Home] [Home]